Forfend, v. t.
Etymology: [Pref. for- + fend. See Forewend.]
To prohibit; to forbid; to avert. [Archaic] Which peril heaven forefend! Shak.
Note: This is etymologically the preferable spelling.
Shades of meaning
Fernald lists forfend only as an antonym, under abide.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given